Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($)	Common Stock [Member]	Preferred Stock [Member]	Additional Paid In Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2018	$ 4,323		$ 165,396,036	$ (13,093)	$ (162,078,525)	$ 3,308,741
Balance (in shares) at Dec. 31, 2018	432,286
Public offering of common stock and warrants, net of issuance costs	$ 4,500		4,778,009			4,782,509
Public offering of common stock and warrants, net of issuance costs (in shares)	450,000
Stock compensation expense			98,033			98,033
Foreign currency translation				2,826		2,826
Net loss					(3,853,116)	(3,853,116)
Balance at Mar. 31, 2019	$ 8,823		170,272,078	(10,267)	(165,931,641)	4,338,993
Balance (in shares) at Mar. 31, 2019	882,286
Balance at Dec. 31, 2019	$ 55,823		178,779,814	(17,315)	(174,524,983)	4,293,339
Balance (in shares) at Dec. 31, 2019	5,582,280
At the market offering, net of offering costs	$ 28,149		5,449,283			5,477,432
At the market offering, net of offering costs, shares	2,814,934
Common stock warrant exercises	$ 40,710		8,101,290			8,142,000
Common stock warrant exercises, shares	4,071,000
Stock compensation expense			79,740			79,740
Foreign currency translation				39,477		39,477
Net loss					(3,949,294)	(3,949,294)
Balance at Mar. 31, 2020	$ 124,682		$ 192,410,127	$ 22,162	$ (178,474,277)	$ 14,082,694
Balance (in shares) at Mar. 31, 2020	12,468,214